Chair construction



Oct. 19, 1943. w. McARTHUR CHAIR CONSTRUCTION 3 Sheets-Sheet 1 FiledJune 28, 1940 NHMH Oct. 19, 1943. w. McARTHUR 2,331,990

CHAIR CONSTRUCTION Filed June 28, 1940 3 Sheets-Sheet 2 Oct. '19, 1943.WMCARTHUR 2,331,990

CHAIR CONSTRUCTION Filed June 28, 1940 5 Sheets-Sheet 5 ha INVENTOR ATTOEY Patented Oct; 19, 1943 CHAIR CONSTRUCTION Warren McArthur, New York,N. Y., assignor to Warren McArthur Corporation, a corporation or NewYork Application June 28, 1940, Serial No. 342,929

4 Claims. (01. 155-88) This invention relates to chairs or seats and anobject is to provide a chair particularly adapted for airplane use.

A further object is to provide a chair of this type constructed andarranged to resist the unusual stresses and stains to which an airplanechair is subjected while at the ame time permitting the use of verylight weight material in its manufacture.

These and other objects which will be apparent to those skilled in theart are accomplished by this invention, one embodiment of which is Theillustrated embodiment of my invention is shown in the drawings asformed'of hollow tubes for light weight, and this is the preferredconstruction although it will be apparent that various features of theinvention are equally adapted to other forms of structural members.

The invention comprises a base frame member including a pair of spacedstanchions, and a seat carrying frame or carriage which is supported andvertically adjustable on the spaced stanchions. The seat supportingcarriage includes a pair of elongated sleeves rigidly secured tothecarriage and slidably mounted on the stanchions which are in turnsecurely anchored to the floor or the like. The sleeve connectionbetween the rigid seat frame and the securely anchored stanchionsprevents any distortion of the parts due to side stresses resulting, forexample, from tilting or banking of a plane in flight.

As illustrated, spaced supporting stanchions l 0 are secured to spacedelongated supports ll adapted to be mounted on tracks for horizontaladjustment in any desired manner. The stanchions are preferably tubularand may be separate members or may, as illustrated, be formed from asingle tube of U-shape bent to form a horizontal base portion [2. Ifseparate members, each stanchion is independently secured to one of thesupports 1 l. v

The seat supporting frame or carriag 13 IS preferably formed from asingle tube bent to provide side members ll, an upper rear transverseframe member I 5, and a lower rear transverse frame member IS. The upperand lower cross members are connected by and rigidly secured to spacedsleeves I'I slidably mounted on the supporting stanchion l0. Each end ofeach sleeve is rigidly secured in a bore formed in a tube-securing block18 which has a groove to receive the adjacent cross frame member or tubeIE or I 6 secured therein by a strap l9 bolted to the block, see Figure5. For additional rig dity a pin 20 extends through the strap and crossmember to prevent rotation of the tubular member relative to theclamping block.

It will be apparent that the seat carriage and connected sleeve membersform a structural unit which is movable vertically on the stanchions.Any suitable device for locking the carriage at different heights can beemployed. That shown consists of a pin 2| extending through an openingin a lower block 18 and adapted to enter perforations 22 in the adjacentface of the associated stanchion. The pin is mounted in a bracket 23secured to the block l8 and pressed inwardly by spring 24. It can beretracted to permit movement of the carriage bya hand lever,

25 connected by link 26 to crank arm 21 on rocker shaft 28 supported ina bracket 28' at each end.

A fork 29 or the like engages a collar 30 on the locking pin 2|.Obviously, lifting the handle 25 retracts pin 21 to permit the seatcarriage to be raised or lowered on the stanchions, while release of thehandle permits the spring 24 to impel the pin into locking position in aperforation in the stanchion. Preferably a lock is provided on eachsleeve. As shown the rocker shaft 28 extends across the carriage toactuate both pins and is similarly supported at each end.

Any type of seat and back frame or frames can be mounted on the seatcarriage I3. The drawings show a back frame 31 and a seat frame 32, thedetailed constructed of which forms no part of this invention.

If desired, means such as elastic cords 33 between a cross member 34,which connects the upper ends of the stanchions l0, and the cross memberI6 of the seat carriage can be employed to lift the carriage uponrelease of the locking pins. When occupied the weight of the occupantwill move the carriage downwardly when the pins are released.

The construction is such as will provide a strong, rigid constructioneven with light weight structural members of tubular form. It will beapparent from Figure 4 that the rectangular formation provided by theseat carriage and supporting sleeves provides a positive lock againstany distortion by side strains resulting,'for example, from banking of aplane in flight. The stanchions being securely anchored to the base nodeformation of the frame structure is possible short of actual collapseof a structural member.

It will be apparent that the invention can be variously modified andadapted within the scope of the appended claims.

I claim:

1. A chair construction comprising a pair of supporting stanchions, aseat carrying frame formed by a single tubular member bent to providespaced side members connected by upper and lower transverse framemembers all formed by said tubular member, frame supporting sleevesslidably mounted on said stanchions, means for rigidly securing' saidtransverse frame members to said sleeves, and means for supporting saidsleeves at any one of a plurality of points on said stanchions.

2. A chair construction comprising a tubular base frame including a pairof tubular supporting stanchions, a seat carrying frame formed by asingle tubular member bent to provide spaced side members connected byupper and lower transverse frame members all formed by said tubularmember, a frame supporting sleeve slidably mounted on each stanchion,means for rigidly securing said transverse frame members to saidsleeves, and means for supporting said sleeves on said stanchions.

3. A chair construction comprising a base frame formed by a lJ-shapedmember bent to form a horizontal base portion and spaced upwardly ber,seat frame supporting sleeves slidably mounted on said stancbions, meansrigidly securing said upper and lower transverse frame members to spacedpoints on said sleeves, and means for supporting said sleeves on saidstanchions.

4. A chair construction comprising a base frame formed by a tubularmember of U-shape bent to form a horizontal base portion and spacedupwardly extending stanchions, a seat carrying frame formed by a secondtubular member bent to provide spaced side members and vertically spacedupper and lower transverse frame members connecting said side membersand all formed by said second tubular member, seat frame supportingsleeves slidably mounted on said stanchions, means rigidly securing saidupper and lower transverse frame members to vertically spaced points onsaid sleeves, and means for supporting said sleeves on said stanchions.

WARREN McARTI-IUR.

